<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title>Insert title here</title>
		<style type="text/css">
			div{
				width:200px;
				height:200px;
				border:1px solid red;
				/* 字体大小 */
				font-size: 20px;
				/* 字体加粗 */
				font-weight: bold;
				/* 斜体 */
				font-style: italic;
				/* 字体样式 */
				font-family:  Microsoft YaHei, Helvetica Neue, Helvetica, STHeiTi, Arial, sans-serif
			}
		</style>
	</head>
	<body>
		<div>今天是个假周五</div>
	</body>
</html>